Thematic Bible: Angel attests the call to, by miracle

Then the angel of the LORD put out the end of the staff that was in his hand and touched the meat and the unleavened bread; and fire sprang up from the rock and consumed the meat and the unleavened bread. Then the angel of the LORD vanished from his sight. When Gideon saw that he was the angel of the LORD, he said, "Alas, O Lord GOD! For now I have seen the angel of the LORD face to face." The LORD said to him, "Peace to you, do not fear; you shall not die." read more.
Then Gideon built an altar there to the LORD and named it The LORD is Peace. To this day it is still in Ophrah of the Abiezrites.